Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
tai khoi » tai khoa, mai khoi, tao khoi
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
thuc van » thuc vat, thuc dan, thuc va
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
tai hai » thi hai, dai hai, tai ha
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach v nang ((tai hai) or (tai khoi)). hieu van tham thuc van hanh dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach v nang ((tai hai) OR (tai khoi)). hieu van tham thuc van hanh dai cua tu.
• Adding a wildcard symbol may retrieve word variants: su sach v nang ((tai hai) or (tai khoi)). hieu van tham thuc van hanh dai cua tu*.