Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thien van » thi van
hanh tai » thanh tai, hang tai, han tai
van than » van thanh, van thang, van tuan
than luc » nhan luc, than duc, thanh luu
cua tre » cua te, cuu tre, dua tren
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
sach v » sach va, sach y, sach 2
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang
luc va » duc va, tuc va, loc va

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 v nang ma hoi. thien van than luc va ((hanh tai) or (tinh toan)) ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach v nang ma hoi. thien van than luc va ((hanh tai) OR (tinh toan)) ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach v nang ma hoi. thien van than luc va ((hanh tai) or (tinh toan)) ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: te sach v nang ma hoi. thien van than luc va ((hanh tai) or (tinh toan)) ((cua tre) OR (cua triet))*.