Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
thuc dan » thuc hanh, hoc dan, thuc vat
dan hanh » dang hanh, dan khanh, dan thanh
sach ky » sac ky, sach y, sach ty
nang co » nang cao, nang doc, nang noi
ve pham » vi pham, v pham, ve phat
ve phan » va phan, ke phan, ve phat
co hoi » co hoc, co loi
di cua » doi cua, de cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang co hoi. hieu ((ve pham) OR (ve phan)) thuc dan hanh ((di cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang co hoi. hieu ((ve pham) OR (ve phan)) thuc dan hanh ((di cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang co hoi. hieu ((ve pham) OR (ve phan)) thuc dan hanh ((di cua) or (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang co hoi. hieu ((ve pham) OR (ve phan)) thuc dan hanh ((di cua) or (dai cua)) te*.