Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh lam » thanh lap, hanh kem, hanh va
va hanh » van hanh, va thanh, va danh
sach ty » sach y, sach tu, sach thu
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
xuc va » duc va, tuc va, luc va
lam va » nam va, dam va, lam ha
va cam » va cham, va cao, 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 sach ty ((nang ma) or (lang xa)) hoi. hieu ((va cam) or (va cac)) xuc va hanh lam va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang ma) OR (lang xa)) hoi. hieu ((va cam) OR (va cac)) xuc va hanh lam va triet.
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang ma) or (lang xa)) hoi. hieu ((va cam) or (va cac)) xuc va hanh lam va triet*.