Perhaps you should try some spelling variations:
thien van » thi van
pham thuc » phap thuc, pham chuc, pham thu
nham thuc » nhan thuc, nam thuc, nham thu
doc sach » hoc sach, toc sach, nuoc sach
kinh dai » sinh dai, kinh dao, kinh hai
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va kinh » va tinh, qua kinh
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ky lang xa hoi. thien van ((pham thuc) or (nham thuc)) va kinh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ky lang xa hoi. thien van ((pham thuc) OR (nham thuc)) va kinh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: doc sach ky lang xa hoi. thien van ((pham thuc) or (nham thuc)) va kinh dai cua tre*.