Perhaps you should try some spelling variations:
hanh trua » thanh tra, hanh tu, hanh sua
trua cua » tru cua, trung cua, qua cua
nang mai » nang ma, nang tai, lang mai
te sach » toc sach
sach ty » sach y, sach tu, sach thu
truc va » thuc va, trung va
hieu va » lieu va, hieu qua
va tham » van tham, va cham, va thanh
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
tuc va » thuc va, tuc xa, duc va
cua te » cua tu

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 mai hoi. hieu va tham ((((truc va) or (thuc vat))) or (tuc va)) hanh trua cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang mai hoi. hieu va tham ((((truc va) OR (thuc vat))) OR (tuc va)) hanh trua cua te.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang mai hoi. hieu va tham ((((truc va) or (thuc vat))) or (tuc va)) hanh trua cua te*.