Perhaps you should try some spelling variations:
thu sang » thu san, thu bang, thu dang
thu hang » thi hang, thuc hanh, thu huong
van hanh » van thanh, ban hanh, van anh
hieu ve » hieu va, hieu van
hanh va » hang va, hanh vi
luc van » luoc van, luu van, duc van
cac luc » cau luc, coc luc, cac nuoc
tu sang » tu san, tu lang, tu quang
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
chi tre » choi tre, cho tre, chi tro
ve cac » va cac, vien cac
va chi » van chi, va che, va cai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sang) or (((thu sang) OR (thu hang)))) ky lang xa hoi. hieu ve cac luc van hanh va chi tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sang) OR (((thu sang) OR (thu hang)))) ky lang xa hoi. hieu ve cac luc van hanh va chi tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sang) or (((thu sang) OR (thu hang)))) ky lang xa hoi. hieu ve cac luc van hanh va chi tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sang) or (((thu sang) OR (thu hang)))) ky lang xa hoi. hieu ve cac luc van hanh va chi tre*.