Perhaps you should try some spelling variations:
thien van » thi van
trinh cua » tinh cua, trinh luat, trinh quan
toc sach » hoc sach, doc sach, thuoc sach
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
nam luc » nang luc, nhan luc, nam thuc
y lang » _ lang, tay lang, yen lang
o lang » hoa lang, hoi lang
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: toc sach ((y lang) or (o lang)) xa hoi. thien van nam luc ((va hanh) OR (va thanh)) trinh cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((y lang) OR (o lang)) xa hoi. thien van nam luc ((va hanh) OR (va thanh)) trinh cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((y lang) or (o lang)) xa hoi. thien van nam luc ((va hanh) OR (va thanh)) trinh cua tu".
• Adding a wildcard symbol may retrieve word variants: toc sach ((y lang) or (o lang)) xa hoi. thien van nam luc ((va hanh) OR (va thanh)) trinh cua tu*.