Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
lanh hai » manh hai, thanh hai, lang chai
hanh vai » hanh vi, hanh va, hanh tai
su sach » vu sach
thuc va » thuc vat, thuc dan, thuc day
vai cua » dai cua, hai cua, lai cua
so sach » so sanh, bo sach, co sach
ky tang » ky nang, ky dang, kho tang
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
ve tham » va tham, ve cham, vi tham
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: ((su sach) or (so sach)) ky tang ((lanh hai) or (lap tai)). hieu ve tham thuc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky tang ((lanh hai) OR (lap tai)). hieu ve tham thuc va hanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky tang ((lanh hai) or (lap tai)). hieu ve tham thuc va hanh vai cua te*.