Perhaps you should try some spelling variations:
thuc dan » thuc hanh, hoc dan, thuc vat
tu sach » thu sach, su sach, te sach
van cam » van nam, van lam, van cau
hanh va » hang va, hanh vi
sach ty » sach y, sach tu, sach thu
thi van » thi lan, thi hanh, thi nang
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
tuc va » thuc va, truc va, tuc xa
ma hoi » mai hoi, xa hoi, ma hoa
va cuu » va cau, va chu, va huu

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 hoi. thi van cam ((tuc va) or (thuc dan)) hanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ma hoi. thi van cam ((tuc va) OR (thuc dan)) hanh va cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. thi van cam ((tuc va) or (thuc dan)) hanh va cuu tre*.