Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cua viet » hoa viet, cua vat, cua dieu
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
luc van » luoc van, luu van, duc van
cac luc » cau luc, coc luc, cac nuoc
nang xa » lang xa, nang ma, mang xa
hieu ve » hieu va, hieu van
ca viet » va viet, co viet, hoa viet
ve cac » va cac, vien cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach y ((nang xa) or (nang x)) hoi. hieu ve cac luc van hanh vai ((cua viet) OR (ca viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach y ((nang xa) OR (nang x)) hoi. hieu ve cac luc van hanh vai ((cua viet) OR (ca viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach y ((nang xa) or (nang x)) hoi. hieu ve cac luc van hanh vai ((cua viet) OR (ca viet))".
• Adding a wildcard symbol may retrieve word variants: thuat sach y ((nang xa) or (nang x)) hoi. hieu ve cac luc van hanh vai ((cua viet) OR (ca viet))*.