Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
van hanh » van thanh, ban hanh, van anh
thai cua » than cua, tri cua, dai cua
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
duc van » duc va, duc tan, duc manh
su sai » su tai, su hai, su mai
su dai » sau dai, si dai, su tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sai) or (su dai)) ky lang xa hoi. hieu ve cham duc van hanh ((thai cua) OR (tai cuc)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sai) OR (su dai)) ky lang xa hoi. hieu ve cham duc van hanh ((thai cua) OR (tai cuc)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sai) or (su dai)) ky lang xa hoi. hieu ve cham duc van hanh ((thai cua) OR (tai cuc)) te".
• Adding a wildcard symbol may retrieve word variants: ((su sai) or (su dai)) ky lang xa hoi. hieu ve cham duc van hanh ((thai cua) OR (tai cuc)) te*.