Perhaps you should try some spelling variations:
ve triet » va trien, su triet
nang ma » tang ma, sang ma, nang cao
hieu va » hieu qua
dinh va » dinh van, dinh ve, tinh va
te sai » te tai, te bai, te lai
sai ky » sac ky
ma hoi » mai hoi, xa hoi, ma hoa
dau va » dau ve, lau va
va ve » va de, va le, va vi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky nang ma hoi. ((hieu va) or (lieu va)) cac ((dau va) or (tu va)) dinh va ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky nang ma hoi. ((hieu va) OR (lieu va)) cac ((dau va) OR (tu va)) dinh va ve triet.
• Adding a wildcard symbol may retrieve word variants: te sai ky nang ma hoi. ((hieu va) or (lieu va)) cac ((dau va) or (tu va)) dinh va ve triet*.