Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh van » thanh van, khanh van, hanh va
cau tren » cu tren, ca tren, cau treo
dau tren » dau tien, dat tren, dau tieng
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » tuc va, luc va, xac 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 ty nang ma hoi. hieu van cam ((xuc va) or (duc va)) hanh van ((cau tren) or (dau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. hieu van cam ((xuc va) OR (duc va)) hanh van ((cau tren) OR (dau tren)).
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. hieu van cam ((xuc va) or (duc va)) hanh van ((cau tren) or (dau tren))*.