Perhaps you should try some spelling variations:
kham chua » kham pha
thu nang » thi nang, thu hang, thu bang
hanh tai » thanh tai, hang tai, han tai
thi hang » thi hanh, thi nang, thi hong
so sach » so sanh, bo sach, co sach
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
chua va » chuc va, chua may, chuan ha
cao hoc » co hoc, cho hoc, chat hoc
ve kham » vu kham, va kham, ve cham
hieu ve » hieu va, hieu van
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: so sach ((thu nang) or (((thi hang) or (thuc hanh)))) cao hoc. hieu ve kham chua va hanh tai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((thu nang) OR (((thi hang) OR (thuc hanh)))) cao hoc. hieu ve kham chua va hanh tai cua tu.
• Adding a wildcard symbol may retrieve word variants: so sach ((thu nang) or (((thi hang) or (thuc hanh)))) cao hoc. hieu ve kham chua va hanh tai cua tu*.