Perhaps you should try some spelling variations:
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
su viet » so viet
y nang » ky nang, ly nang, v nang
xac va » tac va, ac va, bac va
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang xa hoi. ((hieu ve) or (hieu va)) cam ((xac va) or (tuc va)) hang va su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang xa hoi. ((hieu ve) OR (hieu va)) cam ((xac va) OR (tuc va)) hang va su viet.
• Adding a wildcard symbol may retrieve word variants: te sach y nang xa hoi. ((hieu ve) or (hieu va)) cam ((xac va) or (tuc va)) hang va su viet*.