Perhaps you should try some spelling variations:
thien van » thi van
pham chuc » pham duc, pham huu, kham chua
phan huy » phan tu, phan xay, van huy
sach tai » sach bai, sach tham, sach dao
hanh tai » thanh tai, hang tai, han tai
sach thi » sach thu, sach thieu, sach tham
tai cua » thai cua, tai cuc, tri cua
va hanh » van hanh, va thanh, va danh
nang co » nang cao, nang doc, nang noi
co hoi » co hoc, co loi
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: so ((sach thi) OR (sach tai)) nang co hoi. thien van ((pham chuc) or (phan huy)) va hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach thi) OR (sach tai)) nang co hoi. thien van ((pham chuc) OR (phan huy)) va hanh tai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach thi) OR (sach tai)) nang co hoi. thien van ((pham chuc) or (phan huy)) va hanh tai cua te".
• Adding a wildcard symbol may retrieve word variants: so ((sach thi) OR (sach tai)) nang co hoi. thien van ((pham chuc) or (phan huy)) va hanh tai cua te*.