Perhaps you should try some spelling variations:
trinh han » trinh quan
thu sach » tu sach, thuat sach, thuoc sach
hieu van » hieu va, thien van, lieu va
dinh hai » dinh thai, tinh hai, dinh ha
tham tuc » tham thuc, thai tuc, nham thuc
van tham » van thanh, van tuan, van chat
nang ma » tang ma, sang ma, nang cao
thu xac » thau xay
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: ((thu sach) or (thu xac)) ky nang ma hoa. hieu van tham tuc xa ((dinh hai) or (trinh han)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thu xac)) ky nang ma hoa. hieu van tham tuc xa ((dinh hai) OR (trinh han)) cua te.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thu xac)) ky nang ma hoa. hieu van tham tuc xa ((dinh hai) or (trinh han)) cua te*.